Oil temperature drop and oil contraction can cause gas space growing in oil pipe and line packing during hot oil pipeline shutdown and restarting.

热油管道停输后，管内油品降温收缩，管内会产生油蒸气空间，从而使管道再启动时出现启动充装过程。

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The pressure reduction coefficient of PE gas pipeline is an important design parameter, and depends on the soil temperature around the buried pipeline.

聚乙烯燃气管道的压力折减系数是重要的设计参数，取决于管道埋设周边地温。

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The key points to control the quality of PE pipeline for gas were discussed in this paper. The raw material, temperature, pressure, velocity of extrusion and so on were discussed.

本文讨论了确保聚乙烯燃气管材产品质量的要点，从原材料、挤出工艺温度控制、挤出压力控制、定型、挤出速度等多个方面进行了讨论。

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The price of natural gas is influenced by several factors including current and anticipated supply and demand of natural gas, temperature changes, amount of gas stored, pipeline charges for transporting gas, and cost of gas for end users.

FORBES: Anadarko Needs Higher NatGas Prices To Justify Stock Price